Trump's visit comes a week after heavy rainfall caused the Guadalupe River in Kerr County to rise 26 feet in less than an hour, killing at least 121, including dozens of children at the nearby Christian summer camp, Camp Mystic. He and first lady Melania Trump will visit flood-affected areas, according to a statement from the first lady's office.

More than 111 people have died across six counties after flash flooding from heavy rain began affecting the state last week.

Renee Smajstrla, a 8-year-old straight-A student from Ingram, Texas, who had played a role in her school’s production of “The Wizard of Oz,” was one of the victims who died in the flash floods at Camp Mystic, her family said.

Viral posts promoted false claims that cloud seeding, a form of weather modification, played a role in the devastation. Meteorologists explain it doesn't work that way.

The state leaves building zoning and permits up to the individual counties. And in most non-city counties, such as Kerr, which had 96 deaths as of Thursday due to floods, some officials tend to be lenient towards building owners with restrictions, some state leaders and environmental experts told ABC News.

The grim task of searching for the scores of people missing from the devastating flood that struck Texas Hill Country nearly a week ago is taking an agonizing toll on searchers.

Over just two hours, the Guadalupe River at Comfort, Texas, rose from hip-height to three stories tall, sending water weighing as much as the Empire State building downstream roughly every minute it remained at its crest. The force of floodwater is often more powerful and surprising than people imagine.

Some governors and mayors are concerned over how current or potential cuts to agencies will impact how the government can respond in the future to major weather events.